Commit | Line | Data |
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1da177e4 LT |
1 | #ifndef _ADDRCONF_H |
2 | #define _ADDRCONF_H | |
3 | ||
1da177e4 LT |
4 | #define MAX_RTR_SOLICITATIONS 3 |
5 | #define RTR_SOLICITATION_INTERVAL (4*HZ) | |
6 | ||
7 | #define MIN_VALID_LIFETIME (2*3600) /* 2 hours */ | |
8 | ||
9 | #define TEMP_VALID_LIFETIME (7*86400) | |
10 | #define TEMP_PREFERRED_LIFETIME (86400) | |
76f793e3 | 11 | #define REGEN_MAX_RETRY (3) |
1da177e4 LT |
12 | #define MAX_DESYNC_FACTOR (600) |
13 | ||
14 | #define ADDR_CHECK_FREQUENCY (120*HZ) | |
15 | ||
16 | #define IPV6_MAX_ADDRESSES 16 | |
17 | ||
5c766d64 JP |
18 | #define ADDRCONF_TIMER_FUZZ_MINUS (HZ > 50 ? HZ / 50 : 1) |
19 | #define ADDRCONF_TIMER_FUZZ (HZ / 4) | |
20 | #define ADDRCONF_TIMER_FUZZ_MAX (HZ) | |
21 | ||
c7dc89c0 | 22 | #include <linux/in.h> |
6a800d45 PM |
23 | #include <linux/in6.h> |
24 | ||
1da177e4 LT |
25 | struct prefix_info { |
26 | __u8 type; | |
27 | __u8 length; | |
28 | __u8 prefix_len; | |
29 | ||
30 | #if defined(__BIG_ENDIAN_BITFIELD) | |
31 | __u8 onlink : 1, | |
32 | autoconf : 1, | |
33 | reserved : 6; | |
34 | #elif defined(__LITTLE_ENDIAN_BITFIELD) | |
35 | __u8 reserved : 6, | |
36 | autoconf : 1, | |
37 | onlink : 1; | |
38 | #else | |
39 | #error "Please fix <asm/byteorder.h>" | |
40 | #endif | |
e69a4adc AV |
41 | __be32 valid; |
42 | __be32 prefered; | |
43 | __be32 reserved2; | |
1da177e4 LT |
44 | |
45 | struct in6_addr prefix; | |
46 | }; | |
47 | ||
48 | ||
1da177e4 LT |
49 | #include <linux/netdevice.h> |
50 | #include <net/if_inet6.h> | |
e4553edd | 51 | #include <net/ipv6.h> |
1da177e4 | 52 | |
ddbe5032 ED |
53 | #define IN6_ADDR_HSIZE_SHIFT 4 |
54 | #define IN6_ADDR_HSIZE (1 << IN6_ADDR_HSIZE_SHIFT) | |
1da177e4 | 55 | |
e8e54d3c JP |
56 | int addrconf_init(void); |
57 | void addrconf_cleanup(void); | |
1da177e4 | 58 | |
e8e54d3c JP |
59 | int addrconf_add_ifaddr(struct net *net, void __user *arg); |
60 | int addrconf_del_ifaddr(struct net *net, void __user *arg); | |
61 | int addrconf_set_dstaddr(struct net *net, void __user *arg); | |
1da177e4 | 62 | |
e8e54d3c JP |
63 | int ipv6_chk_addr(struct net *net, const struct in6_addr *addr, |
64 | const struct net_device *dev, int strict); | |
bfeade08 | 65 | |
59fbb3a6 | 66 | #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE) |
e8e54d3c | 67 | int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr); |
65d4ed92 | 68 | #endif |
52eeeb84 | 69 | |
e8e54d3c JP |
70 | int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev); |
71 | ||
72 | struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, | |
73 | const struct in6_addr *addr, | |
74 | struct net_device *dev, int strict); | |
75 | ||
76 | int ipv6_dev_get_saddr(struct net *net, const struct net_device *dev, | |
77 | const struct in6_addr *daddr, unsigned int srcprefs, | |
78 | struct in6_addr *saddr); | |
79 | int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr, | |
80 | unsigned char banned_flags); | |
81 | int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr, | |
82 | unsigned char banned_flags); | |
83 | int ipv6_rcv_saddr_equal(const struct sock *sk, const struct sock *sk2); | |
84 | void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr); | |
85 | void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr); | |
1da177e4 | 86 | |
4bed72e4 | 87 | static inline unsigned long addrconf_timeout_fixup(u32 timeout, |
95c96174 | 88 | unsigned int unit) |
4bed72e4 YH |
89 | { |
90 | if (timeout == 0xffffffff) | |
91 | return ~0UL; | |
92 | ||
93 | /* | |
94 | * Avoid arithmetic overflow. | |
95 | * Assuming unit is constant and non-zero, this "if" statement | |
96 | * will go away on 64bit archs. | |
97 | */ | |
98 | if (0xfffffffe > LONG_MAX / unit && timeout > LONG_MAX / unit) | |
99 | return LONG_MAX / unit; | |
100 | ||
101 | return timeout; | |
102 | } | |
103 | ||
104 | static inline int addrconf_finite_timeout(unsigned long timeout) | |
105 | { | |
106 | return ~timeout; | |
107 | } | |
108 | ||
2a8cc6c8 YH |
109 | /* |
110 | * IPv6 Address Label subsystem (addrlabel.c) | |
111 | */ | |
e8e54d3c JP |
112 | int ipv6_addr_label_init(void); |
113 | void ipv6_addr_label_cleanup(void); | |
114 | void ipv6_addr_label_rtnl_register(void); | |
115 | u32 ipv6_addr_label(struct net *net, const struct in6_addr *addr, | |
116 | int type, int ifindex); | |
2a8cc6c8 | 117 | |
1da177e4 LT |
118 | /* |
119 | * multicast prototypes (mcast.c) | |
120 | */ | |
e8e54d3c JP |
121 | int ipv6_sock_mc_join(struct sock *sk, int ifindex, |
122 | const struct in6_addr *addr); | |
123 | int ipv6_sock_mc_drop(struct sock *sk, int ifindex, | |
124 | const struct in6_addr *addr); | |
125 | void ipv6_sock_mc_close(struct sock *sk); | |
126 | bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr, | |
127 | const struct in6_addr *src_addr); | |
128 | ||
129 | int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr); | |
130 | int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr); | |
131 | int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr); | |
132 | void ipv6_mc_up(struct inet6_dev *idev); | |
133 | void ipv6_mc_down(struct inet6_dev *idev); | |
134 | void ipv6_mc_unmap(struct inet6_dev *idev); | |
135 | void ipv6_mc_remap(struct inet6_dev *idev); | |
136 | void ipv6_mc_init_dev(struct inet6_dev *idev); | |
137 | void ipv6_mc_destroy_dev(struct inet6_dev *idev); | |
138 | void addrconf_dad_failure(struct inet6_ifaddr *ifp); | |
139 | ||
140 | bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group, | |
141 | const struct in6_addr *src_addr); | |
142 | ||
143 | void ipv6_mc_dad_complete(struct inet6_dev *idev); | |
5f81bd2e CW |
144 | |
145 | /* A stub used by vxlan module. This is ugly, ideally these | |
146 | * symbols should be built into the core kernel. | |
147 | */ | |
148 | struct ipv6_stub { | |
149 | int (*ipv6_sock_mc_join)(struct sock *sk, int ifindex, | |
150 | const struct in6_addr *addr); | |
151 | int (*ipv6_sock_mc_drop)(struct sock *sk, int ifindex, | |
152 | const struct in6_addr *addr); | |
153 | int (*ipv6_dst_lookup)(struct sock *sk, struct dst_entry **dst, | |
154 | struct flowi6 *fl6); | |
155 | void (*udpv6_encap_enable)(void); | |
156 | }; | |
157 | extern const struct ipv6_stub *ipv6_stub __read_mostly; | |
158 | ||
daad1512 YH |
159 | /* |
160 | * identify MLD packets for MLD filter exceptions | |
161 | */ | |
162 | static inline bool ipv6_is_mld(struct sk_buff *skb, int nexthdr, int offset) | |
163 | { | |
164 | struct icmp6hdr *hdr; | |
165 | ||
166 | if (nexthdr != IPPROTO_ICMPV6 || | |
167 | !pskb_network_may_pull(skb, offset + sizeof(struct icmp6hdr))) | |
168 | return false; | |
169 | ||
170 | hdr = (struct icmp6hdr *)(skb_network_header(skb) + offset); | |
171 | ||
172 | switch (hdr->icmp6_type) { | |
173 | case ICMPV6_MGM_QUERY: | |
174 | case ICMPV6_MGM_REPORT: | |
175 | case ICMPV6_MGM_REDUCTION: | |
176 | case ICMPV6_MLD2_REPORT: | |
177 | return true; | |
178 | default: | |
179 | break; | |
180 | } | |
181 | return false; | |
182 | } | |
1da177e4 | 183 | |
e8e54d3c JP |
184 | void addrconf_prefix_rcv(struct net_device *dev, |
185 | u8 *opt, int len, bool sllao); | |
1da177e4 | 186 | |
1da177e4 LT |
187 | /* |
188 | * anycast prototypes (anycast.c) | |
189 | */ | |
e8e54d3c JP |
190 | int ipv6_sock_ac_join(struct sock *sk, int ifindex, |
191 | const struct in6_addr *addr); | |
192 | int ipv6_sock_ac_drop(struct sock *sk, int ifindex, | |
193 | const struct in6_addr *addr); | |
194 | void ipv6_sock_ac_close(struct sock *sk); | |
195 | ||
196 | int ipv6_dev_ac_inc(struct net_device *dev, const struct in6_addr *addr); | |
197 | int __ipv6_dev_ac_dec(struct inet6_dev *idev, const struct in6_addr *addr); | |
198 | bool ipv6_chk_acast_addr(struct net *net, struct net_device *dev, | |
a50feda5 | 199 | const struct in6_addr *addr); |
1da177e4 LT |
200 | |
201 | ||
202 | /* Device notifier */ | |
e8e54d3c JP |
203 | int register_inet6addr_notifier(struct notifier_block *nb); |
204 | int unregister_inet6addr_notifier(struct notifier_block *nb); | |
205 | int inet6addr_notifier_call_chain(unsigned long val, void *v); | |
1da177e4 | 206 | |
e8e54d3c JP |
207 | void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex, |
208 | struct ipv6_devconf *devconf); | |
d67b8c61 | 209 | |
48daa3bb ED |
210 | /** |
211 | * __in6_dev_get - get inet6_dev pointer from netdevice | |
212 | * @dev: network device | |
213 | * | |
214 | * Caller must hold rcu_read_lock or RTNL, because this function | |
215 | * does not take a reference on the inet6_dev. | |
216 | */ | |
217 | static inline struct inet6_dev *__in6_dev_get(const struct net_device *dev) | |
1da177e4 | 218 | { |
48daa3bb | 219 | return rcu_dereference_rtnl(dev->ip6_ptr); |
1da177e4 LT |
220 | } |
221 | ||
48daa3bb ED |
222 | /** |
223 | * in6_dev_get - get inet6_dev pointer from netdevice | |
224 | * @dev: network device | |
225 | * | |
226 | * This version can be used in any context, and takes a reference | |
227 | * on the inet6_dev. Callers must use in6_dev_put() later to | |
228 | * release this reference. | |
229 | */ | |
230 | static inline struct inet6_dev *in6_dev_get(const struct net_device *dev) | |
1da177e4 | 231 | { |
48daa3bb ED |
232 | struct inet6_dev *idev; |
233 | ||
8814c4b5 | 234 | rcu_read_lock(); |
48daa3bb | 235 | idev = rcu_dereference(dev->ip6_ptr); |
1da177e4 LT |
236 | if (idev) |
237 | atomic_inc(&idev->refcnt); | |
8814c4b5 | 238 | rcu_read_unlock(); |
1da177e4 LT |
239 | return idev; |
240 | } | |
241 | ||
e8e54d3c | 242 | void in6_dev_finish_destroy(struct inet6_dev *idev); |
1da177e4 | 243 | |
48daa3bb | 244 | static inline void in6_dev_put(struct inet6_dev *idev) |
1da177e4 LT |
245 | { |
246 | if (atomic_dec_and_test(&idev->refcnt)) | |
247 | in6_dev_finish_destroy(idev); | |
248 | } | |
249 | ||
48daa3bb ED |
250 | static inline void __in6_dev_put(struct inet6_dev *idev) |
251 | { | |
252 | atomic_dec(&idev->refcnt); | |
253 | } | |
1da177e4 | 254 | |
48daa3bb ED |
255 | static inline void in6_dev_hold(struct inet6_dev *idev) |
256 | { | |
257 | atomic_inc(&idev->refcnt); | |
258 | } | |
1da177e4 | 259 | |
e8e54d3c | 260 | void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp); |
1da177e4 LT |
261 | |
262 | static inline void in6_ifa_put(struct inet6_ifaddr *ifp) | |
263 | { | |
264 | if (atomic_dec_and_test(&ifp->refcnt)) | |
265 | inet6_ifa_finish_destroy(ifp); | |
266 | } | |
267 | ||
48daa3bb ED |
268 | static inline void __in6_ifa_put(struct inet6_ifaddr *ifp) |
269 | { | |
270 | atomic_dec(&ifp->refcnt); | |
271 | } | |
1da177e4 | 272 | |
48daa3bb ED |
273 | static inline void in6_ifa_hold(struct inet6_ifaddr *ifp) |
274 | { | |
275 | atomic_inc(&ifp->refcnt); | |
276 | } | |
1da177e4 | 277 | |
1da177e4 LT |
278 | |
279 | /* | |
280 | * compute link-local solicited-node multicast address | |
281 | */ | |
282 | ||
283 | static inline void addrconf_addr_solict_mult(const struct in6_addr *addr, | |
284 | struct in6_addr *solicited) | |
285 | { | |
286 | ipv6_addr_set(solicited, | |
0e7b8dcd YH |
287 | htonl(0xFF020000), 0, |
288 | htonl(0x1), | |
289 | htonl(0xFF000000) | addr->s6_addr32[3]); | |
1da177e4 LT |
290 | } |
291 | ||
b27b28cb | 292 | static inline bool ipv6_addr_is_multicast(const struct in6_addr *addr) |
1da177e4 | 293 | { |
0e7b8dcd | 294 | return (addr->s6_addr32[0] & htonl(0xFF000000)) == htonl(0xFF000000); |
1da177e4 LT |
295 | } |
296 | ||
b27b28cb | 297 | static inline bool ipv6_addr_is_ll_all_nodes(const struct in6_addr *addr) |
1da177e4 | 298 | { |
d1641565 YH |
299 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
300 | __u64 *p = (__u64 *)addr; | |
301 | return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(1))) == 0UL; | |
302 | #else | |
48daa3bb | 303 | return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | |
fed85383 | 304 | addr->s6_addr32[1] | addr->s6_addr32[2] | |
48daa3bb | 305 | (addr->s6_addr32[3] ^ htonl(0x00000001))) == 0; |
d1641565 | 306 | #endif |
1da177e4 LT |
307 | } |
308 | ||
b27b28cb | 309 | static inline bool ipv6_addr_is_ll_all_routers(const struct in6_addr *addr) |
1da177e4 | 310 | { |
d1641565 YH |
311 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
312 | __u64 *p = (__u64 *)addr; | |
313 | return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | (p[1] ^ cpu_to_be64(2))) == 0UL; | |
314 | #else | |
48daa3bb | 315 | return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | |
fed85383 | 316 | addr->s6_addr32[1] | addr->s6_addr32[2] | |
48daa3bb | 317 | (addr->s6_addr32[3] ^ htonl(0x00000002))) == 0; |
d1641565 | 318 | #endif |
1da177e4 LT |
319 | } |
320 | ||
b27b28cb | 321 | static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr) |
c7dc89c0 | 322 | { |
48daa3bb | 323 | return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE); |
c7dc89c0 FT |
324 | } |
325 | ||
ca97a644 YH |
326 | static inline bool ipv6_addr_is_solict_mult(const struct in6_addr *addr) |
327 | { | |
9d100774 YH |
328 | #if defined(CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS) && BITS_PER_LONG == 64 |
329 | __u64 *p = (__u64 *)addr; | |
330 | return ((p[0] ^ cpu_to_be64(0xff02000000000000UL)) | | |
331 | ((p[1] ^ cpu_to_be64(0x00000001ff000000UL)) & | |
332 | cpu_to_be64(0xffffffffff000000UL))) == 0UL; | |
333 | #else | |
334 | return ((addr->s6_addr32[0] ^ htonl(0xff020000)) | | |
335 | addr->s6_addr32[1] | | |
336 | (addr->s6_addr32[2] ^ htonl(0x00000001)) | | |
337 | (addr->s6_addr[12] ^ 0xff)) == 0; | |
338 | #endif | |
ca97a644 YH |
339 | } |
340 | ||
20380731 | 341 | #ifdef CONFIG_PROC_FS |
e8e54d3c JP |
342 | int if6_proc_init(void); |
343 | void if6_proc_exit(void); | |
20380731 ACM |
344 | #endif |
345 | ||
1da177e4 | 346 | #endif |